/**
 * Filename: PopMenu.java
 *
 * @author Firefly
 * @contact postfirefly@163.com
 * @time 2016/6/19 17:28
 */
package com.github.postsanf.yinian.activity.pop;

import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;

import com.github.postsanf.yinian.R;
import com.github.postsanf.yinian.utils.UIHelper;

import java.util.ArrayList;

/**
 * 菜单弹窗
 */
public class MinePopMenu extends PopupWindow {
    private Context mContext;

    // 列表弹窗的间隔
    protected final int LIST_PADDING = 10;

    // 实例化一个矩形
    private Rect mRect = new Rect();

    // 坐标的位置（x、y）
    private final int[] mLocation = new int[2];

    // 屏幕的宽度和高度
    private int mScreenWidth, mScreenHeight;

    // 判断是否需要添加或更新列表子类项
    private boolean mIsDirty;

    // 位置不在中心
    private int popupGravity = Gravity.NO_GRAVITY;

    // 弹窗子类项选中时的监听
    private OnItemOnClickListener mItemOnClickListener;

    // 定义列表对象
    private ListView mListView;

    // 定义弹窗子类项列表
    private ArrayList<PopMenuItem> mActionItems = new ArrayList<PopMenuItem>();

    public MinePopMenu(Context context) {
        // 设置布局的参数
        this(context, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    }

    public MinePopMenu(Context context, int width, int height) {
        this.mContext = context;

        // 设置可以获得焦点
        setFocusable(true);
        // 设置弹窗内可点击
        setTouchable(true);
        // 设置弹窗外可点击
        setOutsideTouchable(true);

        // 获得屏幕的宽度和高度
        WindowManager wm = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        mScreenWidth = wm.getDefaultDisplay().getWidth();
        mScreenHeight = wm.getDefaultDisplay().getHeight();
        // 设置弹窗的宽度和高度
        setWidth(width);
        setHeight(height);
        setBackgroundDrawable(new BitmapDrawable());
        // 设置弹窗的布局界面
        setContentView(LayoutInflater.from(mContext).inflate(
                R.layout.pop_menu, null));
        setAnimationStyle(R.style.AnimHead);
        initUI();
    }

    /**
     * 初始化弹窗列表
     */
    private void initUI() {
        mListView = (ListView) getContentView().findViewById(R.id.title_list);
        mListView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int index,
                                    long arg3) {
                // 点击子类项后，弹窗消失
                dismiss();
                if (mItemOnClickListener != null)
                    mItemOnClickListener.onItemClick(mActionItems.get(index),
                            index);
            }
        });
    }

    /**
     * 显示弹窗列表界面
     */
    public void show(View view) {
        // 获得点击屏幕的位置坐标
        view.getLocationOnScreen(mLocation);
        // 设置矩形的大小
        mRect.set(mLocation[0], mLocation[1], mLocation[0] + view.getWidth(),
                mLocation[1] + view.getHeight());

        // 判断是否需要添加或更新列表子类项
        if (mIsDirty) {
            populateActions();
        }

        // 显示弹窗的位置
        showAtLocation(view, popupGravity, mScreenWidth - LIST_PADDING
                - (getWidth()) - UIHelper.dip2px(mContext, 0), mRect.bottom);
    }

    /**
     * 设置弹窗列表子项
     */
    private void populateActions() {
        mIsDirty = false;

        // 设置列表的适配器
        mListView.setAdapter(new BaseAdapter() {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                if (convertView == null) {
                    convertView = LayoutInflater.from(mContext).inflate(
                            R.layout.pop_menu_item, parent, false);
                }
                TextView textView = PopMenuHolder.get(convertView, R.id.txt_title);
                textView.setTextColor(mContext.getResources().getColor(R.color.color_3a3a3a));
                textView.setTextSize(15);
                textView.setGravity(Gravity.CENTER);
                textView.setSingleLine(true);
                ImageView imageview = PopMenuHolder.get(convertView, R.id.txt_img);
                PopMenuItem item = mActionItems.get(position);
                textView.setText(item.mTitle);
                imageview.setVisibility(View.GONE);
                View view = PopMenuHolder.get(convertView, R.id.txt_line);
                if (position == mActionItems.size() - 1) {
                    view.setVisibility(View.GONE);
                } else {
                    view.setVisibility(View.VISIBLE);
                }
                return convertView;
            }

            @Override
            public long getItemId(int position) {
                return position;
            }

            @Override
            public Object getItem(int position) {
                return mActionItems.get(position);
            }

            @Override
            public int getCount() {
                return mActionItems.size();
            }
        });
    }

    /**
     * 添加子类项
     */
    public void addAction(PopMenuItem action) {
        if (action != null) {
            mActionItems.add(action);
            mIsDirty = true;
        }
    }

    /**
     * 清除子类项
     */
    public void cleanAction() {
        if (mActionItems.isEmpty()) {
            mActionItems.clear();
            mIsDirty = true;
        }
    }

    /**
     * 根据位置得到子类项
     */
    public PopMenuItem getAction(int position) {
        if (position < 0 || position > mActionItems.size())
            return null;
        return mActionItems.get(position);
    }

    /**
     * 设置监听事件
     */
    public void setItemOnClickListener(
            OnItemOnClickListener onItemOnClickListener) {
        this.mItemOnClickListener = onItemOnClickListener;
    }

    /**
     * @author yangyu 功能描述：弹窗子类项按钮监听事件
     */
    public static interface OnItemOnClickListener {
        public void onItemClick(PopMenuItem item, int position);
    }
}